instant - noun

a very short time (as the time it takes the eye to blink or the heart to beat)

a particular point in time

instant - adjective

• occurring with no delay
• in or of the present month
• demanding attention

instant - thesaurus

clamant   crying   exigent   flash   heartbeat   insistent   inst   instantaneous   jiffy   minute   moment   second   trice   twinkling   wink